#include<stdio.h>
#include"add.h"
#include"mul.h"
#include"sub.h"
#include"div.h"
int main()
{
	int x=100;
	int y=20;
	printf("x+y=%d\n",add(x,y));
	printf("x*y=%d\n",mul(x,y));
	printf("x-y=%d\n",sub(x,y));
	printf("x/y=%d\n",div(x,y));

	printf("Hello World\n ");

	return 0;
}
